Answer: I'm on my way toward making a better life for myself.
Explanation: The highway can be thought of as a route where there are endless possibilities and a long way to go and the old dirt track means a place where there are no good opportunities and everything's not as good as it could be.
The preposition in question is "on", and its purpose is to show you where the dog chewed. You can remove the preposition to form the sentence "The brown dog chewed the rawhide bone." You can also rearrange it to find the preposition, "on the rawhide bone, the dog chewed" in what is commonly known as the Yoda technique.
Answer:
I believe the answer is D'Artagnan
